More specifically, that is a dump rake. It's quite an old machine, of a style that has long since been abandoned. The metal seats on those rakes as well as on old tractors of that era and the following era, are amazingly comfortable. The dump rake was popular from the mid-1850's to about the end of the 1890's, when the much more-efficient,easier-to-use side-delivery rake was invented. That dump rake in the photo is probably over 100 years old.